UPDATE: [Thanks to andreosokin]: As some of you already know, new guests have been announced for Ayreon's new double album The Theory Of Everything. As usual, Arjen Anthony Lucassen is surrounded by a constellation of stars and this time it is no different. Since the last update, Arjen has announced three new guests: progressive rock legend keyboardist Rick Wakeman (Yes), the first female singer is Cristina Scabbia (Lacuna Coil) and the final keyboardist is Jordan Rudess (Dream Theater).

What else could you ask for?

Original news, published on 21.08.2013: Ayreon or Arjen Anthony Lucassen is having a little bit of fun lately revealing more and more guests that will appear on the band's new album The Theory Of Everything. Today it was confirmed that Janne "JB" Christoffersson of Grand Magus will be one of the singers to guest on the album apart from Mr. Marco Hietala (Nightwish, Tarot). Keith Emerson (Emerson, Lake & Palmer) was also confirmed as the first keyboardist to appear on the release. You can watch the clips introducing the guests below where you also get a taste of new music.

Arjen is having guessing contests every day, so follow his Facebook page to find out more.

I only listen to Ayreon from time to time because he brings some of my faves to his works. I really enjoy anyting Anneke Van Giersbergen and Floor Jansen did with Ayreon, so I'm hoping they'll be back.

I only listen to Ayreon from time to time because he brings some of my faves to his works. I really enjoy anyting Anneke Van Giersbergen and Floor Jansen did with Ayreon, so I'm hoping they'll be back.

If they're coming back, I doubt it'll be for this album.
Arjen said that there would be only new faces for this one. (With the obvious exception of Ed Warby, of course! )